Harvey is a technology startup that develops AI-powered solutions for legal professionals. Founded in 2022 in San Francisco, California, the company focuses on automating workflows and improving efficiency in legal departments and law firms using large language models (LLMs). The company was established by Winston Weinberg and Gabriel Pereyra.

Founding

Harvey, officially registered as Counsel AI Corporation, was founded in 2022 by Winston Weinberg, drawing from his experience at the law firm O’Melveny & Myers, and Gabriel Pereyra, who previously conducted research at DeepMind, Meta AI, and Google Brain. The founders initially developed a prototype using legal questions sourced from Reddit and presented it to OpenAI, leading to seed funding. Harvey became one of the first companies backed by the OpenAI Startup Fund.

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Technology and Products

Harvey’s platform operates on a custom large language model based on OpenAI’s GPT-4 and is hosted on Microsoft Azure to ensure high levels of security and scalability. The main product suite includes Assistant, Vault, Knowledge, and Workflows, which support functions such as contract analysis, document comparison, legal research, litigation drafting, and regulatory reviews.

• Assistant generates drafts in response to natural language legal prompts and helps streamline document simplification, editing, and drafting.
• Vault is a secure repository for uploading and analyzing documents.
• Knowledge integrates with extensive legal datasets—including legislation, case law, and regulatory documents—to provide substantiated answers.

Use Cases

Harvey’s solutions are used by over 250 law firms and corporate clients globally. A major milestone occurred in 2023 when Allen & Overy deployed Harvey across its 3,500-lawyer workforce. The platform has since been adopted by 28 of the AmLaw 100 firms. Corporate clients include Comcast, PwC, Rajah & Tann Singapore, Cuatrecasas, and Deutsche Telekom.

Investments

Since its inception, Harvey has participated in several investment rounds. It first received funding from the OpenAI Startup Fund and later raised $300 million in a 2023 round led by Sequoia Capital, reaching a valuation of $3 billion. Other participants included Coatue, GV (Google Ventures), Kleiner Perkins, Elad Gil, and RELX Group. In 2025, the company is aiming to raise an additional $100 million in a new funding round led by Alphabet’s GV fund.

Product Development Approach

Harvey integrates legal professionals directly into its product development cycle by partnering engineers with lawyers from top firms and in-house legal departments. This collaboration ensures contextual relevance and practical usability for the legal tools being developed.

Partnership with Microsoft

Harvey has built deep integrations with Microsoft’s SharePoint, Microsoft 365 Copilot, and Word applications. This enables users to leverage Harvey’s AI tools within Microsoft Word without needing to manually upload documents. These integrations also support real-time document matching and data management through SharePoint Embedded.

Security

The platform complies with global data security and privacy standards, including SOC 2 Type II, ISO 27001, GDPR, and CCPA. Harvey anonymizes user data, honors deletion requests, and keeps client data segregated. Enterprise-grade features include SAML SSO, IP allowlisting, audit logs, and data lifecycle management tools.

Competition

Harvey operates in the same space as other AI-powered legal platforms such as Casetext, Lex Machina, Robin AI, Spellbook, and Eve. Harvey distinguishes itself through its direct collaboration with domain experts, Microsoft Azure-based infrastructure, and its established partnerships with large-scale legal organizations.

Future Outlook

Harvey plans to expand its portfolio of fine-tuned AI models, deepen integrations with Microsoft Copilot and Azure, and offer more scalable solutions for corporate legal departments. The company also aims to train its own open-source models using Nvidia accelerated computing systems. In the long term, Harvey envisions expanding across additional sectors—including major law firms, financial institutions, and public agencies—by forming strategic partnerships and broadening its domain reach.